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18. A sample of size n = 44 has sample mean x = 56.9 and sample standard deviation s = 9.1. a. Construct a 98%

18. A sample of size n = 44 has sample mean x = 56.9 and sample standard deviation s = 9.1. a. Construct a 98% confidence interval for the population mean . b. If the sample size were n = 30, would the confidence interval be narrower or wider? Show the work be organized

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